<?php

/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2019/8/19
 * Time: 16:02
 */
class 计算文件大小
{

}
function dirSize($directoty){
    $dir_size=0;

    if($dir_handle=@opendir($directoty))
    {
        while($filename=readdir($dir_handle)){
            $subFile=$directoty.DIRECTORY_SEPARATOR.$filename;
            if($filename=='.'||$filename=='..'){
                continue;
            }elseif (is_dir($subFile))
            {
                $dir_size+=dirSize($subFile);
            }elseif (is_file($subFile)){
                $dir_size+=filesize($subFile);
            }
        }
        closedir($dir_handle);
    }
    return ($dir_size);
}

$dir_size=dirSize("xym");
echo round($dir_size/pow(1024,1),2)."KB";